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Impulse Turbine with 3D Guide Vanes for Wave Energy Conversion

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Journal of Thermal Science 2006年第1期15卷 27-30页

作者： Manabu TAKAO Toshiaki SETOGUCHI Kenji kaneko Shuichi NAGATA Department of Mechanical Engineering Matsue National College of Technology 14-4 Nishiikuma-cho Matsue-shi Shimane 690-8518 Japan Department of Mechanical Engineering Saga University 1 Honjo-machi Saga-shi Saga 840-8502 Japan Institute of Ocean Energy Saga University 1 Honjo-machi Saga-shi Saga 840-8502 Japan

In this study, in order to achieve further improvement of the performance of an impulse turbine with fixed guide vanes for wave energy conversion, the effect of guide vane shape on the performance was investigated by experiment. The investigation was performed by model testing under steady flow condition. As a result, it was found that the efficiency of the turbine with 3D guide vanes are slightly superior to that of the turbine with 2D guide vanes because of the increase of torque by means of 3D guide vane, though pressure drop across the turbine for the 3D case is slightly higher than that for the 2D case.

关键词： fluid machinery impulse turbine guide vane wave energy conversion.

Natures of Rotating Stall Cell in a Diagonal Flow Fan

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Journal of Thermal Science 2005年第1期14卷 9-14页

作者： N.SHIOMI K.kaneko T.SETOGUCHI Department of Mechanical Engineering Saga University Saga 840-8502JapanDepartment of Mechanical Engineering Saga UniversitySaga 840-8502JapanDepartment of Mechanical Engineering Saga UniversitySaga 840-8502Japan

In order to clarify the natures of a rotating stall cell, the experimental investigation was carried out in a high specific-speed diagonal flow fan. The pressure field on the casing wall and the velocity fields at the rotor inlet and outlet were measured under rotating stall condition with a fast response pressure transducer and a single slant hot-wire probe, respectively. The data were processed using the “Double Phase-Locked Averaging (DPLA)”technique, which enabled to obtain the unsteady flow field with a rotating stall cell in the relative co-ordinate system fixed to the rotor. As a result, the structure and behavior of the rotating stall cell in a high specific-speed diagonal flow fan were shown.

关键词： rotating stall cell diagonal flow fan unsteady flow DPLA technique.

Malnutrition and Its Association with the Mortality of Patients with Femoral Intertrochanteric Fractures: A Retrospective Analysis of Japanese Patients

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Risk factors for intraoperative perforation during endoscopic submucosal dissection of superficial esophageal squamous cell carcinoma

Open Journal of Orthopedics（矫形学期刊） 2024年第1期

作者： Taizo kaneko Kyoko Matsudaira Kentaro Hayakawa Fumiaki Tokimura Tsuyoshi Miyazaki

来源：博看期刊评论

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World Journal of Gastroenterology 2017年第3期23卷 478-485页

作者： Masaaki Noguchi Tomonori Yano Tomoji Kato Tomohiro Kadota Maomi Imajoh hiroyuki Morimoto Shozo Osera Atsushi Yagishita Tomoyuki Odagaki Yusuke Yoda Yasuhiro Oono Hiroaki Ikematsu Kazuhiro kaneko Department of Gastroenterology Endoscopy division National Cancer Center Hospital East Division of Gastroenterology and Hepatology Department of Internal Medicine The Jikei University School of Medicine

AIM To identify the risk factors and clarify the subsequent clinical *** This study retrospectively analyzed consecutive patients with esophageal squamous cell carcinoma( ESCC) treated using endoscopic submucosal dissection(ESD) between April 2008 and October 2012. We divided the ESCC lesions into perforation cases and non-perforation cases, and compared characteristics and endoscopic findings between the two groups. "Intraoperative perforation" was defined as the detection of a perforation site during ESD and the presence of mediastinal *** In total, 147 patients with 156 ESCC lesions were treated by ESD. Intraoperative perforation was recorded for nine lesions(5.8%) from nine patients. Multivariate analysis identified mucosal deficiency larger than 75% of the circumference of the esophagus as an independent risk factor for intraoperative perforation(OR = 7.37, 95%CI: 1.45-37.4, P = 0.016). The predominant site of perforation was the left wall [6/9(67%)]. Six of nine perforation sites were successfully closed by clips during the procedures. Two of nine cases required drainage for pleural effusions; however, all nine cases recovered with conservative treatment and without surgical intervention. At the median follow up of 42 mo after ESD, no cases of local recurrence or distant organ metastasis had been *** This study suggests that mucosal deficiency larger than 75% of the luminal circumference is a risk factor for intraoperative perforation during ESD for ESCC.

关键词： Endoscopic submucosal dissection Risk factor Esophageal carcinoma Perforation

Influence of Fine Sediment on the Fluidity of Debris Flows

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Journal of Mountain Science 2013年第2期10卷 233-238页

作者： Norifumi HOTTA Takahiro kaneko Tomoyuki IWATA Haruo NISHIMOTO Faculty of Life and Environmental Sciences University of Tsukuba3058577 IbarakiJapan Faculty of Agriculture The University of Tokyo1138657 TokyoJapan Graduate School of Agricultural and Life Sciences The University of Tokyo1138657 TokyoJapan

Debris flows include a great diversity of grain sizes with inherent features such as inverse grading, particle size segregation, and liquefaction of fine sediment. The liquefaction of fine sediment affects the fluidity of debris flows, although the behavior and influence of fine sediment in debris flows have not been examined sufficiently. This study used flume tests to detect the effect of fine sediment on the fluidity of laboratory debris flows consisting of particles with various diameters. From the experiments, the greatest sediment concentration and flow depth were observed in the debris flows mixed with fine sediment indicating increased flow resistance. The experimental friction coefficient was then compared with the theoretical friction coefficient derived by substituting the experimental values into the constitutive equations for debris flow. The theoretical friction coefficient was obtained from two models with different fine-sediment treatments： assuming that all of the fine sediments were solid particles or that the particles consisted of a fluid phase involving pore water liquefaction. From the comparison of the friction coefficients, a fully liquefaction state was detected for the fine particle mixture. When the mixing ratio and particle size of the fine sediment were different, some other eases were considered to be in a partially liquefied transition state. These results imply that the liquefaction of fine sediment in debris flows was induced not only by the geometric conditions such as particle sizes, but also by the flow conditions.

关键词： Debris flow Fine sediment Friction coefficient Liquefaction Open channel Reynolds stress

Nontidal sea level changes in Hiroshima Bay,Japan

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Acta Oceanologica Sinica 2014年第9期33卷 47-55页

作者： ZHANG Chuanzheng kaneko Arata ZHU Xiaohua LIN Ju Graduate School of Engineering Hiroshima University Higashi-Hiroshima State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of Oceanography State Oceanic Administration College of Information Science and Technology Ocean University of China

Nontidal sea level changes generated in Hiroshima Bay of the Seto-Inland Sea in Japan are studied over various time scales, from the sub-tidal （2 d to 1 month） to inter-annual scales （〉2 years）. The total sea level variation produces a standard deviation （STD） of 12.5 cm. The inter-annual component of the sea level variation in Hiroshima Bay oscillates with a STD of 3.4 cm, forming a long-term trend of 4.9 mm/a. The STD of the sea level variation is 9.8 cm for the seasonal component （8 months to 2 years） and 4.7 cm for the intra-seasonal one （1 month to 8 months）. Significant sea level variations with a STD of 4.2 cm also occur in the sub-tidal range. Special attention is paid to the sub-tidal sea level changes. It is found that the upwelling and associated transient sea level changes generated along the north coast of Hiroshima Bay （opened southward） by the strong northerly wind, play a significant role in sub-tidal sea level changes. The transient sea level changes are over 10 cm in most cases when caused by typhoons that pass through the Pacific Ocean offthe Kii Peninsula, located at about 400 km east of Hiroshima Bay. Reasonable sea level changes are evaluated by the balance of pressure forces at the onshore and offshore boundary of the study domain.

关键词： nontidal sea level changes Hiroshima Bay upwelling transient sea level changes

Smart Processing in Materials Tectonics:Fabrication of Photonic Crystals for Terahertz Wave Control by Using Micro-Stereolithography

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Tsinghua Science and Technology 2009年第S1期14卷 160-163页

作者： Soshu Kirihara Daisuke Sano Masaru kaneko Smart Processing Research Center Joining and Welding Research Institute Osaka University Osaka 567-0047 Japan Smart Processing Research Center Joining and Welding Research Institute Osaka University Division of Sustainable Energy and Environmental Engineering Graduate School of Engineering Osaka University

Photonic crystals with three-dimensional dielectric structures were fabricated to control terahertz waves effectively by using micro-stereolithography of a CAD/CAM process. The photonic crystals with a diamond structure composed of acrylic lattice with nanosized alumina particles were fabricated. Dense alumina structures were obtained by successive dewaxing and sintering in an air atmosphere. The electromagnetic wave properties of these samples were measured by using a terahertz spectroscopy device. The micro periodic structures exhibited perfect band gaps in the terahertz range. To control terahertz waves, micrometer sized electromagnetic devices for cavities, filters, and antennas will be necessary.

关键词： diamond photonic crystal band gap micro-stereolithography terahertz wave

Template preparation of twisted nanoparticles of mesoporous silica

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Particuology 2011年第1期9卷 51-55页

作者： Kui Niu Zhongbin Ni Chengwu Fu Tatsuo kaneko Mingqing Chen School of Chemical and Material Engineering Jiangnan University Wuxi 214122 Jiangsu China School of Materials Science Japan Advanced Institute of Science and Technology 1-1 Asahidai Nomi 923-1292 Japan

Optical isomers of N-lauroyl-L-（Or-D-） alanine sodium salt {C12-L-（Or-D-）AIaS} surfactants were used for the preparation of mesoporous silica nanoparticles with a twisted hexagonal rod-like morphology. Thermogravimetric analysis （TGA） was used to determine the temperature for template removal. Circular dichroism （CD） spectra of the surfactant solution with various compositions illustrated the formation and supramolecular assembly of protein-like molecular architecture leading to formation of twisted nanopar- ticles. Scanning electron microscopy （SEM）, high-resolution transmission electron microscopy （HRTEM） and X-ray powder diffraction （XRD） patterns of these as-synthesized mesoporous silica confirmed that the twisted morphology of these nanoparticles was closely related to the supramolecular-assembled complex of amino acid surfactants.

关键词： Supramolecular assembly Twisted morphology Mesoporous silica Amino acid surfactants

Vortices within the Separation Region in a Decelerating Channel Flow (Effect of Inlet Velocity Gradient)

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Journal of Thermal Science 2005年第4期14卷 341-345页

作者： Yoichi KINOUE Toshiaki SETOGUCHI Mohammad MAMUN Norimasa SHIOMI Kenji kaneko Department of Mechanical Engineering Saga University1HonjoSaga840-8502Japan

An experimental investigation was made into three-dimensional separated flow and the vortices within the flow separation in a decelerating channel flow generated by the suction from a porous side wall. The flows along the side and bottom walls were visualized by the surface tuft method. The turbulent internal flow was measured by the split-film probe to investigate the turbulent flow including the reverse flow. In the flow visualization for the strong decelerating flow （the suction flow ratio：0.8）, two typical flow patterns appear alternatively. One is that the flow near the bottom wall separates more upstream than the flow near the top wall and a clockwise vortex can be seen in the separation region. Another is the reversal flow pattern with a counterclockwise vortex. By the turbulent flow measurement using the split-film probe, two peaks of turbulence level are observed for the strong decelerating flow case. These peaks can be related with two flow patterns mentioned above.

关键词： vortices within the separation decelerating channel flow turbulent flow split-film probe